Bosons in a toroidal trap: Ground state and vortices
- 1 April 1999
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 59 (4) , 2990-2995
- https://doi.org/10.1103/physreva.59.2990
Abstract
We study the Bose-Einstein condensate (BEC) in a three-dimensional toroidal sombrero-shaped trap. By changing the parameters of the potential, or the number of bosons, it is possible to modify strongly the density profile of the BEC. We consider the ground-state properties for positive and negative scattering length and calculate the spectrum elementary excitations. We also discuss the macroscopic phase coherence and superfluidity of the BEC by analyzing vortex states and their stability.Keywords
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